Main Parts Of Model 53009 - NorthStar 53009 Owner's Manual


Make sure your extension cord is properly wired and in good electrical condition. Always replace
a damaged extension cord or have it repaired by a qualified electrician before using it.

Protect your extension cords from sharp objects, excessive heat, and damp or wet areas.
1. Pressure Switch-Auto/Off switch: In AUTO position, compressor shuts off automatically when
tank pressure reaches maximum preset pressure. In OFF position, compressor will not operate.
Switch should be in OFF position when connecting or disconnecting power cord from electrical outlet.
NEVER attempt to adjust this pressure switch.
2. Pressure Switch Unloader: Vents discharge air to atmosphere in start/stop operation.
3. Check Valve: To seal off and maintain pressure after the top end pressure setting of pressure
switch is reached. The check valve works in conjunction with the pressure switch unloader to provide
a load-less start to the compressor system. A quick burst of air escaping from the pressure switch
unloader after an electric unit reaches top end indicates the check valve is working properly. If the
compressor has a mysterious leak after stopping that cannot be traced elsewhere, the check valve
may require servicing/replacing.
4. Air Tank Pressure Gauge: This pressure gauge indicates the reserve air pressure in the air tank.
5. Outlet Pressure Gauge: The outlet pressure gauge indicates the air pressure available at the
outlet side of the regulator. This pressure is controlled by the regulator and is always less or equal to
the air tank pressure.

Main Parts of Model 53009

Page 11 of 24